Here's why:
* Rose DeWitt Bukater is a fictional character: She was created for the movie, not based on a real person.
* No historical evidence: There's no evidence that a real woman named Rose DeWitt Bukater boarded the Titanic.
* Artistic liberties: The movie took artistic liberties with its characters and storyline. While the sinking of the Titanic was a real historical event, the characters and their interactions were fictionalized.
Therefore, it's highly unlikely that a drawing of Rose DeWitt Bukater exists. It's possible that fan art or sketches of the character might exist, but these would be fictional representations based on the movie.